Originally Posted by
gsa103
Mine seems like it's >99%.
It normally picks up cars at about 300yds, going over a rise or around a sharp corner, you definitely lose range
It doesn't work well in high traffic areas, since there's always a car behind, and it can't differentiate between lanes. But then again, if it's a high traffic area, it's safe to assume there's always a car behind you and act accordingly.
Where I live, I assume there is always motor vehicle approaching (because that's normally the case).